[Radiance-general] daylight factor and rtrace cmd

[PAUPELIN-HUCHARD Valere]

Hello, 
 
I'm trying to do daylight factor calculation. I am observing a 1 meter
height offset between my workplan point file which is already at 0.85m above
the floor (*.fld) and the rtrace result (*.irr).
Someone would tell me why?
 
the command used is:
rtrace -ab 7 -ad 2048 -oodv -I
rcp.oct<numeric/plan_de_travail.fld>numeric/090715_BU_Rennes_07_vitrage_irra
diance.irr
 
four first lines sample of the files:
 
plan_de_travail.fld:
x          y         z         o
0.50     -0.25     1.84     0 0 1
0.50     0.00      1.84     0 0 1
0.50     0.25      1.84     0 0 1
0.50     0.50      1.84     0 0 1
 
090715_BU_Rennes_07_vitrage_irradiance.irr
x                        y                        z
o                                                                          r
g                         b
5.000000e-001    -2.500000e-001     2.840000e+000     0.000000e+000
0.000000e+000 -1.000000e+000     1.406147e-001     1.406147e-001
1.406147e-001 
5.000000e-001     0.000000e+000    2.840000e+000     0.000000e+000
0.000000e+000 -1.000000e+000     1.581891e-001     1.581891e-001
1.581891e-001 
5.000000e-001     2.500000e-001     2.840000e+000     0.000000e+000
0.000000e+000 -1.000000e+000     1.765201e-001     1.765201e-001
1.765201e-001 
5.000000e-001     5.000000e-001     2.840000e+000     0.000000e+000
0.000000e+000 -1.000000e+000     1.890535e-001     1.890535e-001
1.890535e-001 
 
I am afraid my daylight factor result are not valid at the height of 1.84m
but at 2.84m, am I wrong?
 
Thanks,
Valere.
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